Thank you for taking the time to review Smush! We really appreciate the feedback. If you run Smush and Google Pagespeed still says “your images need compressing and resizing” your images were not scaled for the container they are being displayed. Scaling images before uploading them can be time-consuming but can save space, speedup load time and help you pass Pagespeed tests.
To fix this, determine what size your image needs to be. You can use the built-in developer tools in Chrome or Firefox to find what height and width your image should be. Once you know how large the image should be, scale your images to the themes container size.
You may not need to scale each image individually. If the images are in your Media Library, you may be able to fix them with a plugin.
I hope this helps. Let us know if you need help looking into this any further.